Did you setup WAMP to have Chrome as your default browser??
I bet you did.
Well I would also guess that it has been reinstalled into a different directory!!
Edit the file "C:\wamp\wampmanager.conf" and look for the parameter
navigator = "C:/Program Files/Mozilla Firefox/firefox.exe"
make sure that is pointing to the correct location for your newly installed Chrome.exe
Save the file and then run
LEFT CLICK on wampmanager -> Refresh
That will cause wamp to rebuild the wampmanager.ini file that wamp uses to find you browser exe file.